In machines for cutting resinous gums



J. DAVIS.

I MACHINES FOR CUTTING RESINOUS GUMS.

/ N 175 44 Patented March 21,1876.

WITNESSES! INVENTOR! N. PETERS. PHDTO LIIHOGRAPMER. WASHINGTON. I) C.

mCjfi'MpQovE CUTTING swoo s-corner p oDEisLAND Specificationfforining,part ma a "ra6nt,n.;-1v5,,o44, dated March 2 1, 1876 {application'filed Y 1 HJAugust SEIS'IS. I

roan vhmn ttmu/g) concern. i 1.1;] Be it kno'wnthatLTJAMEs DAvrs,:of Pawtucket,in the county of Providencelan d State of Rhode Island, have invented certain new anduseful Improvements in Machinery for Cutting Resinous Gums used in thearts of dyeing and tanning, of which the following is aspecification: I

Resinous and; gummy agents used in the arts, like cutch, gambier, and japonica, are

required to be cut into small piecespr, shavings preparatory to. the operation-jot ex-- tracting their coloring or other properties I for which theyarevaluable.

p This operation has hitherto been performed by hand,

7 and, from the gummynature of the material, itis necessarily a very tedious and laborious one, and no ordinary cutting machinery is adapted to perform the work on account of the circumstance that the gum ad heres tothe entire surface of the cutting-knife.

My invention has resulted in a practically useful machine, which enables the operation of shaving or slicing such gums or resinous'substances to be performed with entire ease and with perfect facility.

Figure 1 is a top view or plan of the machine. Fig. 2 is a side elevation. Fig. 3 is a vertical section on line a; as, Fig. 2. Figs. 4 to 6 represent detailed parts,

The machine consists, essentially, of a reciprocating cutting-knife, a table suitably arranged for enabling the gum to be fed to the knife, and devices for clearing and lubricating the knife after each slice of gum has been cut off.

A represents the frame of the machine. B, Fig. 2, is a knife, which is attached to aframe,

a, such frame being mounted in suitable guides, 12, and is capable of receiving a reciprocating movement by means of the shacklelink 0, connecting the knife-frame with a revolving crank or wheel, 0, driven by power applied in any-preferred way. The knife B may be set obliquely to the axis of the knifeframe, so as to obtain-the advantage of a drawcut, if preferred.

At right angles with the plane in which the knife reciprocates is placed an endless feedingtable, D, the arrangement of which, relatively to the knife-frame, is showniatFig. '3. A crank, E, enables the operator to feed forward the material to be sliced by hand, or, if preferred, the table may have imparted to it an intermittent movement by means of a pawl and ratchet gear, so as to be automatic in its operation at the proper time.

It is-necessary, for the successful working of the apparatus above described, or any similar apparatus having a reciprocating cutter and a feeding-table, that there should be a means for cleaning and lubricating the knife after each out has been made; and herein resides my improvement;

'I n combinationwith any suitable machinery for cutting slices successfully from amass of gum, I employ a wiper, F, which is to be so constructed and arranged that it can adapt itself to the form of the knife, and, pressing against the sides of the blade, wipe from it,

as the knife is completing a stroke andabout commencing a new one, the adhering gum. In this instance the wiper has two wings, (shown in section at Fig. 5,) each of which is capable of vibrating upon its central longitudinal axis by means ofpivot-hinges d a', Fig. 6. The inner contiguous faces of the wings are covered with sheepskin dressed with the wool on. A spring, 0, Fig. 5, applied to the two wings, causes their inner faces to stand at an angle with each other, with the widest opening toward the knife, and so that, as the knife is returning after making a cut and before completing its stroke, it will enter between the wings of the wiper. The continued movement of the knife-frame past the axis of the pivoted wings causes their front edges to approach each other, and thus close upon the sides of the knife-blade and, by conforming to the shape of the same, clean it of all gum which adheres to it.

It is necessary that the knife-blade should be lubricated, preparatory to making a cut, by water or by oil, and, also, it-is desirable. to wet the sheepskin covering of thewiper to facilitate the removal of gum from the knife-blade.

I accordingly combine with the wiper a pipe,

-g, Fig. 2, which is arranged to discharge a instead of a rcciprocatingcutter, a rotary cutter may be employed having, in connection with it, a table or support for the gum to be.

sliced; and, in combination with such machine, a wiper, so arranged that the knife-blade shall be obliged to pass between the rubbing-cushions composing the wiper, can be used. Such structure would employ my invention.

It, will be seen that, however the table and i cutters may be constructed, the gum must be so presented to the cutter that the slices cut byjit will be uniform in thickness, and also that it is important for saving time in the operation that the masses of gum be as large as possible, consistent with the capacity of the cutter. For these reasons it is obvious that the cutting-table should be capable of being advanced gradually and evenly toward the cutter, either in a plane at right angles to the plane in which the cutter operates, or in a plane so nearly approximating thereto as would result in the cutting of regular slices from the mass of gum. With a reciprocating cutter, as shown, the table or feeding surface would need only to be moved toward the cutter, as described, but with a rotary cutter the table would also be arranged to be moved toward the cutting-edge of the cutter, so that the latter might operate after the table had sn it e tln ed jnfd f hroper. thickness. f. l l

I am aware that meat, &c., as heretofore con'strncted, reciprocating and rotary 'cutters have been employed A in. connection with clearers, which prevented the cutters from 'being"logged, and also in f connection with rotating'tables or tubs for cony taining the niaterialytogb drninced; While such machines are well adapted .for chopping or mincing, it is obvious that :they are incapable of being practicallypemployedin cutting thin and regular slices from a mass of gum.

What I claim as my invention, and desire to secure by Letters Patent, is

1. In a machine for cutting gum into slices, the combination of a vertical slicing-cutter, which cuts a slice at each forward stroke, a wiper for clearing the blade, of the cutter, and a feeding-table for supporting'the gum, which is arranged to advance the gum-evenly toward the cutter, substantially as'described, whereby slices of regular thickness may becut from a mass of gum, as set forth. i

2. The combination of a cutter for slicing gum with a wiper, F, composed of hinged wings or cushions, and capable of adapting their rubbing-faces to the shape of the cutter,

substantially as described.

3. The combination of .a cutter, B, a wiper, and a pipe, 9, for conveying water or other lubricant to the wiper, and thence to the cutters, substantially as described.

JAMES DAVIS. Witnesses:

J. G. B. Woons, Tnos. F. COSGROVE.

inmachines for mincing 

